Clear Creek & Duwe’iq Wetland [6]

Clear Creek, a Puget Sound salmon stream, flows into Dyes Inlet, which supports  shellfish beds, water recreation activities, and nearshore wildlife habitat. Like many Puget Sound streams, Clear Creek has been encroached on by rapid development as the Puget Sound region booms. The creek became notorious for flooding nearby businesses and roadways, costing businesses and homeowners time and money, contributing to water quality problems, and causing instream habitat loss for fish.

A large-scale restoration project has returned three branches of Clear Creek to 30 acres of its historical floodplain and has restored natural functions so the system can manage stormwater while also supporting a diverse population of fish and wildlife. Additionally, improvements were made to a popular adjacent walking and biking trail connecting to the town of Silverdale. These efforts promote a healthy local environment, higher quality of life for residents, and economic vitality.

The newly restored floodplain has been able to contain and manage the first year’s winter storm events, preventing flooding to downstream infrastructure and habitat.

Funding Sources:

  • Floodplains by Design (initiated by a $500,000 grant from the U.S. Environmental Protection Agency)
  • Kitsap County’s Public Works Stormwater Division
  • Kitsap County’s Public Works Roads Division

Congressional District: 6

Partners:

  • Kitsap County Public Works
  • Natural Systems Design
  • Seton Construction
  • Kitsap Conservation District
  • Clear Creek Task Force
  • Wild Fish Conservancy
  • Hood Canal Salmon Enhancement Group
  • Washington State University, Kitsap Extension
  • Washington Conservation Corps
  • Kitsap Stream Stewards
  • Citizen volunteers
  • Washington State Department of Ecology
  • Washington Department of Fish and Wildlife
  • Suquamish Tribe
  • West Sound Watershed Council

Another state and local cooperative project on Clear Creek used natural infrastructure to address polluted stormwater runoff from the commercial area of Silverdale. Kitsap County transformed an unused 3-acre lot into the Duwe’iq Stormwater Treatment Wetland.

The stormwater treatment wetland removes up to 90 percent of the harmful metals, solids, and oils in runoff water from 13 acres of parking lot and rooftop before discharging into Clear Creek. An initial pool provides settling of solids, and the slow movement of water meandering through the facility allows contact with plants, resulting in contaminant removal. Once the water is treated, it discharges through a new, naturalized outfall into Clear Creek. This exemplary wetland demonstrates how effectively stormwater can be cleaned by using biological processes before discharging into sensitive streams.

Funding:

  • Kitsap County Public Works
  • Washington State Department of Ecology

Congressional District: 6

Partners:

  • Kitsap County Public Works
  • Parametrix
  • Sound Excavation
  • Kitsap Conservation District

Further questions? Think you can use this story as inspiration for your own project? Please inquire with:

Chris May–Surface and Stormwater Management Devision Director

cmay@co.kitsap.wa.us

or

Barbara Zaroff–Capital Projects Engineer for Kitsap County

BZaroff@co.kitsap.wa.us

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